Format
Maps

Map of Allegheny County, Pennsylvania : from actual surveys
General-content county map showing roads, railroads, place-names, individual buildings in rural areas, and householders' names in rural areas. Does not show property lines or cadastral data. Also covers the Pittsburgh metropolitan area. Hand col. to emphasize township, borough, and city boundaries. Relief shown by hachures. "Entered according to act of Congress in the year 1883 by Otto Krebs in the office of the Librarian ...